package song.NO_4;
/**
 * @version 1.21 2019
 * @author songyunlong
 */

import java.time.LocalDate;
import java.util.ArrayList;
import java.util.Arrays;

public class Main {
    private final int a;
    public static Main fun(){
        return new Main(5);
    }
    public Main(){
        this.a = 4;
    }
    public Main(final int aa){
        this.a = aa;
    }
    public void print(){
        System.out.println(this.a);
    }
    public static void main(String[] args){
        Main m = Main.fun();
        m.print();
        int a = (int)(Math.random()*20);
        System.out.println(a);
    }
}
